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Old 09-21-2018, 06:07 AM   #15
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I have not found a manufacturer that recommends EPDM for potable water. But to each his own.
You are absolutely correct. It is obvious I am a newbie. I was thinking about high volume water hose and completely failed to consider the intended use of the water. A bad choice for potable water. Bad taste and rubber odor. I will try to think things through more thoroughly before I post advice. Thanks for pointing it out.
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Old 09-21-2018, 10:15 AM   #16
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When we lived in our off grid house we had a 550 gallon water tank buried up the hill and 300' away from the house. We only had 11 PSI of water pressure. However, knowing the problems that might create, I plumbed everything in the house with 3/4" pipe and used 1" pipe from the tank to the house. We never had a problem with water. Bigger is better but it doesn't take a lot of pressure to meet household needs.
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Old 09-21-2018, 10:36 AM   #17
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Wow! So much good info! Sorry TonyMac, you might as well be speaking Greek, but I think I get the gist. Since we leave here soon to head south, I'm not making any changes this year, except filling the onboard tank. First project next summer is fixing this. Thanks everyone!
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Old 09-21-2018, 10:43 AM   #18
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When we lived in our off grid house we had a 550 gallon water tank buried up the hill and 300' away from the house. We only had 11 PSI of water pressure. However, knowing the problems that might create, I plumbed everything in the house with 3/4" pipe and used 1" pipe from the tank to the house. We never had a problem with water. Bigger is better but it doesn't take a lot of pressure to meet household needs.


Tank must be only about 10-12 feet up the hill for that little pressure? More height-more pressure.
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Old 09-22-2018, 07:32 PM   #19
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Water pressure increases at the rate of .45# per foot of elevation. That puts the tank about 24 higher
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Old 09-22-2018, 07:43 PM   #20
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I'm suprised! Uphill?? So, how big are your interior plumbing lines? From my C in Fluid Dynamics from a State College, I'd say that's your restriction. The Laminar Effect, the drag caused by the walls of the hose verses the free flow away from the walls of the hose, of the 5/8" hose times the length hose, is far less than the 3/8" interior plumbing, plus the 90* corners, faucets valves, etc. But if that's what you're seeing, that's what it is. Make sure you have a good high flow pressure regulator, your filter isn't plugged, then maybe run parellel waterlines to reduce your laminar effect even fruther. A single 5/8"id hose provides .31sqin of area of water to 3/8"id interior lines capable of carrying .11 sqin. This should work.
Never seen a house with under 1/2" interior plumbing, most have 3/4".

And Rollondown has the right answer for next year. Get rid of that stretchy hose.
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Old 09-23-2018, 12:42 PM   #21
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Water pressure increases at the rate of .45# per foot of elevation. That puts the tank about 24 higher
Yeah, I always figure it at half a pound per foot. Makes the math a little easier to do in my head.

The hills of middle TN aren't that steep and after hand digging 300' of trench and a hole big enough to bury a 550 gallon tank I was done.
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